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The one-platoon system, also known as iron man football, was a system in American football where players played on both offense and defense. It was the result of rules that limited player substitutions, rules that are also standard procedure in many other sports, but were eliminated in the 1940s. The alternative system is known as the "two-platoon system", or simply the "platoon system", because of its use of separate offensive and defensive units. Each system was used at different times in American college football and in the National Football League. ==History== Prior to 1941, virtually all football players saw action on "both sides of the ball," playing in both offensive and defensive roles. From 1941 to 1952, the National Collegiate Athletic Association (NCAA) allowed unlimited substitution. This change was originally made because of the difficulty in fielding highly skilled players during the years of the Second World War, in which many able-bodied college-age men volunteered for or were drafted into military service.〔 The first known use of the so-called "two-platoon" system was by Michigan head coach Fritz Crisler in 1945 against an Army team under head coach "Colonel" Earl "Red" Blaik. Michigan lost the game 28–7, but Crisler's use of eight players who played only on offense, eight who played only on defense, and three that played both, impressed Blaik enough for him to adopt it for his own team.〔 Blaik, a former soldier himself, coined the "platoon" terminology in reference to the type of military unit.〔Douglas S. Looney, (One Is More Like It ), ''Sports Illustrated'', 3 September 1990, retrieved 20 January 2009.〕 Between 1946 and 1950, Blaik's two-platoon teams twice finished the season ranked second in the Associated Press polls and never finished lower than 11th.〔 In 1954, the NCAA emplaced a set of new rules requiring the use of the one-platoon system, primarily due to financial reasons.〔〔Clarence Munn, (Thumbs Down On The One Platoon ), ''Sports Illustrated'', 29 November 1954, retrieved 20 January 2009.〕 The system allowed only one player to be substituted between plays, which effectively put an end to the use of separate specialized units.〔 Tennessee head coach "General" Robert Neyland praised the change as the end of "chickenshit football".〔 In 1958, LSU coach Paul Dietzel came up with a unique three-platoon system. It consisted of three teams of 11 different players, and was designed to keep his players from being fatigued in an era when most players started on both offense and defense. Instead of replacing individual players during the game, Dietzel would bring in an entirely new set of players between plays and series. The three teams were called the White Team (the first-string offense and defense), the Gold (Go) Team (the second-string offense), and the Chinese Bandits (the second-string defense). The system worked, as the Tigers went undefeated and won the a national championship. The Chinese Bandits, the second-string defensive unit, which consisted of less-talented but ferocious players, became hugely popular with LSU fans and remains one of the most legendary pieces of LSU football history.〔Chet Hilburn, ''The Mystique of Tiger Stadium: 25 Greatest Games: The Ascension of LSU Football'' (Bloomington, Indiana: WestBow Press, 2012), p. 31〕 After the 1964 season, twelve years since the mandate requiring one-platoon, the NCAA repealed the rules enforcing its use and allowed an unlimited amount of player substitutions.〔〔(17 Reasons Why Knute Rockne Wouldn't Recognize This Game ), Athlon Sports, retrieved 20 January 2009.〕 This allowed, starting with the 1965 season,〔Robert C. Gallagher, (''The Express: The Ernie Davis Story'' ), p. 63, Random House, 2008, ISBN 0-345-51086-0.〕 teams to form separate offensive and defensive units as well as "special teams" which would be employed in kicking situations. The reinstatement of the two-platoon system allowed players to become more specialized by focusing on a limited number of plays and skills related to their specific position.〔K. Adam Powell, Woody Durham, ("An Era of Change (1963-1968) ) (Google Books cache), ''Border Wars: The First Fifty Years of Atlantic Coast Conference Football'', Scarecrow Press, 2004, ISBN 0-8108-4839-2, ISBN 978-0-8108-4839-9.〕 By the early 1970s, however, some university administrators, coaches and others were calling for a return to the days of one-platoon football.〔(One-platoon football seen as a money saver ), ''The Free-Lance Star'', November 22, 1974.〕 The sport of arena football used a limited one platoon system (from which quarterbacks, kickers and one "specialist" were exempt) from its inception until 2007. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「One-platoon system」の詳細全文を読む スポンサード リンク
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